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The Ethernet Interface

The Ethernet Interface enables Series 90 PLCs to communicate with other Series 90 PLCs, with with GE Fanuc PLC programming software, and with applications developed using the SRTP protocol, such as CIMPLICITY® HMI.

The Ethernet Interfaces described in this manual have “client/server” capability. As a “client” the Interfaces can initiate communications with other Series 90 PLCs containing Ethernet Interfaces. This is done from the PLC ladder program using the COMMREQ function. As a “server” the Interfaces respond to requests from other devices such as PLC programming software, a Host computer running an SRTP application, or another Series 90 PLC acting as a “client”. No PLC programming is required for server operation.

Ethernet Communications System

The diagram below represents a basic Ethernet Communications system.

Ethernet

 

 

Cable

 

 

Transceiver

Transceiver

Transceiver

Network

 

 

Connection

 

 

Transceiver Transceiver

Network

Connection

Series 90-30

Ethernet

Series 90-30

 

 

PLC

PLC

 

 

 

Interface

CPU 364 or 374

 

 

 

 

Series 90-70

Ethernet

 

 

with Embedded

PLC

 

 

Interface

 

 

Ethernet Interface

 

 

 

 

 

Host Computer or

 

 

 

Programmer

Control Device Running an

 

 

 

 

SRTP Application

 

 

 

 

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TCP/IP Ethernet Communications for the Series 90™ PLC User's Manual– May 2002

GFK-1541B

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GE GFK-1541B manual Ethernet Interface, Ethernet Communications System